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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 14 September 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind north 15 knots diminishing to light near noon then becoming southeast 15 this evening. Wind veering to south 15 late overnight then increasing to south 20 Tuesday morning. Wind veering to southwest 20 Tuesday afternoon then diminishing to southwest 15 Tuesday evening.

Scattered showers Tuesday evening with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 14 September 2026
Today Tonight and Tuesday. Waves 0.5 metres subsiding to less than 0.5 this afternoon then building to 0.5 to 1 near midnight.

Extended Forecast

Issued 03:00 AM EDT 14 September 2026
Wednesday Wind north 15 knots diminishing to light in the afternoon.
Thursday Wind light.
Friday Wind north 15 knots diminishing to light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 10:30 AM EDT 14 September 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 14 September 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today high 1027 mb located over Lower Michigan.
By 10:30 a.m. EDT Tuesday high 1030 mb located off New England.

By 10:30 a.m. EDT Tuesday approaching low 995 mb located over
northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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